Terrible FPS is some games, good on others

[GtheGecko]

Hey dudes, I play mostly CS:GO. My frames are just terrible in the game, dropping to 50 at points, even though I should be getting atleast 250 fps constantly. I have a lot of handles even with only CS open, but windows in general has a lot of handles, so I don't think it's that. See, this is where stuff gets weird, I get good fps in every other game. Except GMOD, I get terrble FPS there aswell. This is a fresh windows 10 install, no antivirus or anything. I ran user benchmark, and my CPU underperformed a bit, but I really don't think that's the issue.
1 more thing, I can't run userbenchmark anymore. This sometimes happened while playing games with unlocked FPS before I reinstalled windows. The GPU just dies on me. The screen goes black, and the windows error sound pops up. The PC is still running because audio is still up.

Specs:

i5 3470
GTX 780ti
Intel 530 series SSD
Asrock H61-VG3 (primary board got sold in a pc, will replace soon)
4gb DDR3 ram (I don't think it's the ram, had 8 recently, no perfomrance decrease)
Samsung 250gb HDD

 

[Superkoopatrooper]

I had a virus for a few weeks on my pc. It was a very cleaver virus that managed to stay out of sight for weeks. It would use my gpu to mine under games it thought I wouldn't notice such as cs:go as it's not too demanding. Whenever I had the taskmanager open, it just wouldn't run at all because it assumed I was checking. I had to reformat all my drives and reinstall windows.

-make sure the windows copy you have is legit windows. Torrent sites can and often do put virus in the install iso.

-make sure you reformat all the drives as your game drive can hide some nasty stuff. Unfortunately you would have to reinstall all your games.

-If the windows iso is stored on the same pc, toss the file and use another iso or even the disk. A malicious program can go after the install iso if it's accessible to it.

 

[GtheGecko]

I had a virus for a few weeks on my pc. It was a very cleaver virus that managed to stay out of sight for weeks. It would use my gpu to mine under games it thought I wouldn't notice such as cs:go as it's not too demanding. Whenever I had the taskmanager open, it just wouldn't run at all because it assumed I was checking. I had to reformat all my drives and reinstall windows.

-make sure the windows copy you have is legit windows. Torrent sites can and often do put virus in the install iso.

-make sure you reformat all the drives as your game drive can hide some nasty stuff. Unfortunately you would have to reinstall all your games.

-If the windows iso is stored on the same pc, toss the file and use another iso or even the disk. A malicious program can go after the install iso if it's accessible to it.

Good tips, but this is a fully legit windows 10 install. I had both of my drives wiped cleanly and had to reinstall everything. Well, it was a cracked windows version, but after you restore it, windows restores everything and the crack wasn't on my PC. I don't think it's this. I can test performance with a linux disk.